Dotnet 9 "Could not load file or assembly" for non-existent AspNetCore packages

[franswah]

I have been struggling to upgrade our AspNetCore service to dotnet 9 due to our use of TypeGen and strange errors I am seeing in our CI/CD pipeline. I unfortunately have not been able to reproduce these errors locally, only when running on our ubuntu build agent.

When running the dotnet-typegen tool, I get a long list of errrors like:

 Could not resolve assembly: Microsoft.AspNetCore.Mvc.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 in any of the searched directories: C:\Users\VssAdministrator\.nuget\packages\; C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages; C:\Program Files\dotnet\shared
  Could not resolve assembly: Microsoft.AspNetCore.Mvc.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 in any of the searched directories: C:\Users\VssAdministrator\.nuget\packages\; C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages; C:\Program Files\dotnet\shared
  Could not resolve assembly: Microsoft.AspNetCore.Mvc.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 in any of the searched directories: C:\Users\VssAdministrator\.nuget\packages\; C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages; C:\Program Files\dotnet\shared
  Could not resolve assembly: Microsoft.AspNetCore.Mvc.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 in any of the searched directories: C:\Users\VssAdministrator\.nuget\packages\; C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages; C:\Program Files\dotnet\shared
  Could not resolve assembly: Microsoft.AspNetCore.Html.Abstractions, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 in any of the searched directories: C:\Users\VssAdministrator\.nuget\packages\; C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages; C:\Program Files\dotnet\shared
  Could not resolve assembly: Microsoft.AspNetCore.Html.Abstractions, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60 in any of the searched directories: C:\Users\VssAdministrator\.nuget\packages\; C:\Program Files (x86)\Microsoft Visual Studio\Shared\NuGetPackages; C:\Program Files\dotnet\shared

Eventually leading to

TypeGen.Core.CoreException: Error generating type dependencies for 'Model'
   ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.AspNetCore.Mvc.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.

It complains about several AspNetCore packages, many of which are deprecated and not in our dependency tree, and most don't even exist with 9.0 versions. I may just need better understanding of what is going on under the hood in TypeGen for it to be looking for these assemblies in order to figure out if there is something wrong with how our build pipeline is set up.

[shokurov]

This seems like regress for #145, #105 and #96. The latter states that, despite errors, the files are generated

[Ritterbitz]

I have come across this as well. I have added an external assembly path to tgconfig.json to find the libraries.

 "externalAssemblyPaths": [
    "c:/users/username/.dotnet/packs/Microsoft.AspNetCore.App.Ref/9.0.0/ref/net9.0/"
  ],

This has another issue where the call to Assembly assembly = Assembly.LoadFile(path); fails with:

System.BadImageFormatException: Could not load file or assembly 'Microsoft.AspNetCore.SignalR.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. Reference assemblies cannot be loaded for execution. (0x80131058)
File name: 'Microsoft.AspNetCore.SignalR.Core, Version=9.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' ---> System.BadImageFormatException: Cannot load a reference assembly for execution.

I changed the line in ResolveFromPaths to Assembly assembly = Assembly.LoadFrom(path); instead and I am getting the resutls I need to get by for now.